The energy of the wave can be absorbed by the substance.
Where does the energy go
It causes some the particles in the substance to vibrate, so it has become heat energy.
Even substances which are transparent , like glass or water absorb some light. In perfectly clear water, light can only penetrate 50 m. By 100m down the ocean it is totally dark.
Reflection
This means to bounce off
Light always reflects at the same angle. At which it hits the reflecting surface
Important points
All waves can be reflected or they can bounce off things
The reflection of sound wave causes echos
The reflection of radio waves
Refraction
This occurs when the light penetrates into a transparent substance, such as glass or water.
The light waves changes their speed and can change direction
Q1 when light waves strike any object, any 3 things can happen
List the 3 things
Reflection
Refraction
Absorption
Q2
Both the angle are the same
Q3
The smoother the surface the shinned it is
Q4
A
It happens In water
B
It changes the shape of the image
C
Because the clear water changes the light waves distorting the image.
The law of reflection states that the angle of incidence ( the light hits the surface ) .Angle of incidence is the angle between the light ray and the normal. The angle of reflection is the angle between the reflected and the normal.
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